On a floured surface, roll each biscuit into a 6-in. circle; set aside.
In a large skillet, cook the beef, onion and green pepper over medium heat until meat is no longer pink; drain. Stir in the tomato sauce, salt, pepper and oregano. Place 2 rounded tablespoonfuls of meat mixture onto each biscuit. Fold in half and press firmly with the tines of a fork to seal edges.
Heat about 3 in. of oil to 375° in a deep fryer. Fry each biscuit until golden brown; drain on paper towels. Serve warm.